Patent US3774411A successfully refreshed from Google Patents.
US3774411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive couplings
Assignee: Simms Group Research and Development Ltd
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Filing: 1971-09-23
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Granted: 1973-11-27
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Expires: 1991-09-23
Abstract
Abstract A coupling for use in a fuel injection pump comprises a pair of members and a fluid pressure operable piston acting intermediate the members. The supply of fluid under pressure of the pistons is controlled by a valve member which is disposed to be influenced by centrifugal force. The motion of the valve member under the action of centrifugal force is resisted by a leaf spring and the force exerted by the leaf spring is adjustable by means of a roller which co-operates with a surface on a member in such a manner that as the centrifugal force increases and the piston moves to effect relative movement of the members, the roller will move to increase the force exerted on the valve element thereby to establish an equilibrium.
Inventors
- 👤 R Phillips
- 👤 Z Miracki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:44
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A drive coupling for use with liquid fuel injection pumping apparatus having a drive shaft, the coupling comprising in combination, a pair of members one of which is connected in use, to a rotary drive element, a bore defined in one of the members, a fluid pressure operable piston mounted in said bore and aRranged when subjected to fluid pressure to effect relative angular movement of the members, resilient means acting between said members and against the action of which the members are moved angularly by the piston, valve means including a valve element which is movable under the action of centrifugal force for controlling the admission of fluid under pressure to said bore, spring means acting on said valve element to oppose the action of centrifugal force and means responsive to the relative angular position of the members for varying the force exerted by the spring means on the valve element.
Claim 2
Dependent Claim
152 words
A drive coupling for use with liquid fuel injection pumping apparatus having a drive shaft, the coupling comprising in combination, a pair of members one of which is connected in use, to a rotary drive element, a bore defined in one of the members, a fluid pressure operable piston mounted in said bore and aRranged when subjected to fluid pressure to effect relative angular movement of the members, resilient means acting between said members and against the action of which the members are moved angularly by the piston, valve means including a valve element which is movable under the action of centrifugal force for controlling the admission of fluid under pressure to said bore, spring means acting on said valve element to oppose the action of centrifugal force and means responsive to the relative angular position of the members for varying the force exerted by the spring means on the valve element.
Claim 3
Dependent Claim
27 words
A coupling as claimed in claim 1 in which said spring means comprises a leaf spring, said valve element contacting the leaf spring intermediate the ends thereof.
Claim 4
Dependent Claim
49 words
A coupling as claimed in claim 2 in which one end of the leaf spring is secured to one of the members, and the other end of the leaf spring bears against a roller the position of which varies as a result of relative angular movement between the members.
Claim 5
Dependent Claim
23 words
A coupling as claimed in claim 3 in which said roller is mounted on an arm carried by the other of said members.
Claim 6
Dependent Claim
76 words
A coupling as claimed in claim 4 including an abutment member carried by said one member said abutment member defining a shaped surface between which and the leaf spring is located the roller, said surface being shaped so that as the piston moves under the action of increasing fluid pressure to effect relative movement of the members, the roller will move on the surface to increase the force applied by the spring to the valve element.
Claim 7
Dependent Claim
20 words
A coupling as claimed in claim 5 including means for adjusting the initial position of the roller on said surface.
References Cited (Backward Citations)
US2858683A
Cited
US3004410A
Cited
US2950610A
Cited
US3062027A
Cited
US3258937A
Cited
US3603112A
Cited
US3650125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |